<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图 -->
    <el-card>
      <!-- 搜素区域 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容"
                    v-model="queryInfo.query"
                    clearable
                    @clear='getGoodsList'>
            <el-button slot="append"
                       icon="el-icon-search"
                       @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary"
                     @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- 表格区域 -->
      <el-table :data="goodslist"
                border
                stripe>
        <el-table-column type="index">
        </el-table-column>
        <el-table-column prop="goods_name"
                         label="商品名称">
        </el-table-column>
        <el-table-column prop="goods_price"
                         label="商品价格(元)"
                         width="110px">
        </el-table-column>
        <el-table-column prop="goods_weight"
                         label="商品重量"
                         width="80px">
        </el-table-column>
        <el-table-column prop="add_time"
                         label="创建时间"
                         width="160px">
          <template v-slot='scope'>
            {{scope.row.add_time|dataFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作"
                         width="120px">
          <template v-slot='scope'>
            <el-button type="primary"
                       size="mini"
                       icon="el-icon-edit"
                       @click="showGoodsById(scope.row.goods_id)"></el-button>
            <el-button type="danger"
                       icon="el-icon-delete"
                       size="mini"
                       @click="removeById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区 -->
      <el-pagination @size-change="handleSizeChange"
                     @current-change="handleCurrentChange"
                     :current-page="queryInfo.pagenum"
                     :page-sizes="[5,10,15,20]"
                     :page-size="queryInfo.pagesize"
                     layout="total, sizes, prev, pager, next, jumper"
                     :total="total"
                     background>
      </el-pagination>
    </el-card>
    <!-- 修改商品的对话框 -->
    <el-dialog title="修改商品信息"
               :visible.sync="editDialogVisible"
               width="50%">
      <el-form :model="editForm"
               :rules="eidtRules"
               ref="editRuleRef"
               label-width="100px">
        <el-form-item label="商品名称"
                      prop="goods_name">
          <el-input v-model="editForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格"
                      prop="goods_price">
          <el-input v-model="editForm.goods_price"></el-input>
        </el-form-item>
        <el-form-item label="商品重量"
                      prop="goods_weight">
          <el-input v-model="editForm.goods_weight"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="editGoods">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'GoodsList',
  data () {
    return {
      // 商品列表
      goodslist: [],
      // 获取商品列表的参数
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 总数据条数
      total: 0,
      // 修改商品信息的对话框显示隐藏
      editDialogVisible: false,
      // 根据id查询到的商品信息
      editForm: {},
      // 修改商品信息的验证规则
      eidtRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getGoodsList()
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList () {
      const { data: res } = await this.$http.get('goods', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败！')
      }
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    // 分页函数
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 删除商品
    async removeById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除商品失败！')
      }
      this.$message.success('删除该商品成功！')
      this.getGoodsList()
    },
    // 添加商品
    goAddPage () {
      this.$router.push('/goods/add')
    },
    // 展示编辑商品的对话框
    async showGoodsById (id) {
      const { data: res } = await this.$http.get('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('获取分类信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 修改商品信息并提交
    async editGoods () {
      const { data: res } = await this.$http.put('goods/' + this.editForm.goods_id, this.editForm)
      if (res.meta.status !== 200) {
        this.$message.error('更改商品信息失败！')
      }
      this.getGoodsList()
      this.editDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
</style>
